Gas-engine.



I R. S. MOORE & J. L. SIMMONS.

GAS ENGINE. APPLICATION FILED NOV. 1, 1910.

Patented Mar. 9, 1915.

3 SHEETS-SHEET 1.

B. s. MOORE & J. L. SIMMONS.

GAS ENGINE.

APPLICATION FILED NOV 1, 1510 Patented 3 SHBETS-SHBBT 2.

iiiiii M ill GAS-ENGINE.

as es.

Specification of Letters Patent.

Patented Mar. 9, i915.

' Application filed November 1, 1910. Serial No. 590,238.

To all whom it may concern a lie it known that we, ROBERT Moons and JAMES LEE SIMMONS, citizens of the United States, residing at Washington, in the District of Columbia, have invented certain new and useful Improvements in Gas-Engines, of which the following is a description, reference being had to the accompanying drawing, and to the letters and figures of reference marked thereon.

The-invention relates to new and useful improvements in gas engines, and more especially to gas engines of the two-cycle rotary cylinder type, although it is obvious from certain aspects of the invention that it is also-adapted to be used in connection with an engine of the type wherein the cylinders are stationary and the crank shaft rotates.

An object of the invention is to provide an engine of this type with an intake valve, which is located in the piston, together with mechanism for operating said valve.

A further object of the invention is to provide mechanism carried by the piston rod of an engine for operating theintake valve as the cylinders rotate;

These and other objects will in part be obvious, and will in part be hereinafter more fully described.

In the drawings which show by'way of illustration one embodiment of the invention, Figure 1 is a horizontal sectional view through the rotating casing and one of the cylinders, showing an engine having my improvements applied thereto; Fig. 2 is a vertical section, taken centrall through one of the cylinders; and Fig. 3 is a view similar to Fig. '1, showing the parts in a difierent position. Fig. 4 is a view similar to Fig. 1, showing the parts in a difierent position. Fig. 5 is a detail in section, showing the mechanism for operating the exhaust valve.

We have shown our invention as applied to an engine having two cylinders 1 and 2, which are connected to, or form a part of, a crank casing 3. Within the crank casing 3 is a stationary crank shaft 4 carrying oppositely disposed cranks 5 and 6. The casing 3 is provided with bearings 7 which engage the crank shaft A. In the preferred form of engine, the crank casing and cylinders rotate about the stationary crank shaft. The cylinder 1 is provided with a a. projecting lug 22,

reciprocating connected to the crank 6 at one end, and is pivotally connected in any suitable way at its other end to the piston 8. A piston rod 10 connected to the crank shaft 5 at one end, and is also connected at its other end to the piston of the oppositely disposed cyl inder. It will readily be seen that as the cylinders rotate about the stationary crank shaft, the pistons moved in and out piston is provided which is seated a of the cylinders. Each With an opening 11, in valve 12. A cross support 13 carries a bearing 14, in which is mounted the stem 15 of the valve 12. A spring 16 surrounding the bearing 14, rests against the cross support atone end, and against a disk 17 at its other end, which disk is secured to the valve stem 15. Said spring normally holds the valve 12 seated in the opening 11. The upper end of the piston rod 9 is enlarged, and provided with a transverse recess finger 19 is pivoted at 20- in said recess or groove 18, and a spring 21 bears against carried by the cam finger 19 at one end, and said spring is seated at the other end in a socket formed in the enlarged end of the piston rod.

A limiting stud 23 extends across the groove or recess 18, and limits the outward movement of the cam finger through the action of the spring 21. During the rotation of the cylinders, the piston rod will change its angular osition, relative to the cylinder. The cam nger 19 is so positioned relative to the outer end of the valve stem, that said finger as the cylinder rotates will be brought into contact with the end of the valve stem, the valve raised and as the finger slips by the end of the stem to the position shown in Fig. 1, the valve will again seat. Upon the continued rotation of the cylinder, the cam finger will be moved to the left, as viewed in Fig. 1, 21 compressed and said finger will slip by the end of the valve stem to a position such as shown in Fig. 3. It will be obvious that if, instead of rotating the cylinders, the crank shaft is rotated and the cylinders remain stationary, the same action will occur between the cam finger 19 and the valve stem of the intake valve.

The exhaust valve 24: is seated in an openpiston 8. A piston rod 9 is will be simultaneously or groove 18. A cam the spring t5 slips by the stem 0 ing in the outer end of the cylinder, and

a suitable spring 26 normally-holds said eX- haust valve seated in said opening. Said main exhaust valveis formed with a central .5 chamber 27. Centrally of said main eX haust valve is an opening 28, which is closed byan auxiliary exhaust or relief valve 29. The stem of the valve 29 extends upward thrbugh the outer end of the main valve 24, where the same is "suitably connected to an operating lever 30, pivoted to a bracket 31, carried by the engine cylinder. The length of the stem of the valve 29 is so proportioned that when the valve 29 is seated in the main exhaust valve, and the main exhaust valve is seated in the opening in the cylinder, there is a slight space 32 between the lever and the upper end of the main exhaust valve 24.

The lever 30 is operated by a suitable cam on the stationary shaft, and as the lever 30 I is drawn downward, the auxiliary or relief valve 29 will first be moved downward, opening the auxiliary valve. As soon as per-end of the main valve, then said main valve will be also forced ddevn', opening {the main exhaustv port. The main valve is held closed by centrifugal force until opened by movement of the lover. The outer wall of the main exhaust valve 24 is provided with a plurality of perforations 33, which lead to the chamber 27. The area of the perforations 33 is slightly greater than the opening produced by the downward movement 0 the auxiliary or relief valve 29. The exhaust valve is so timed that the relief valve will be opened, so that as the compressed gases rush through the relief valve and the plurality of perforations-33, the report is mutlled or deadened.

We will now describe the operation of our device, starting with the parts positioned as in Fig. 2, wherein the gas is compressed in the end of the cylinder and the piston is substantially at the firing point. 'As the 7 gases expand the piston is moved downward, and the cylinder rotated. The intake valve 12 is held seated, and the cam finger 19 will slip by the end of the valve stem to the 7 position shown in'Fig. 3. When the cylind'er reaches the position indicated at on, Fig. 1, the cam finger 19 will engage the lower end of the stem of the intake valve 12, and said intake valve will be opened. The exhaust valve is timed so as to open substantially at this point, so that as the gases rush from the crank chamber where they are.

compressed by the inward stroke of the pistons, into the cylinder, the burned gases are forced quickly through the exhaust valve. When the cylinder-reaches the point 3 indicated in 1, the cam finger 19 the intake valve, allow- 'ton.- Said oi-l guard, as c the lever 30 comes into contact with the up-- ing the same to quickly close, and during the remainder of the rotation of the cylinder, the valve is closed and the gas is compressed in the ends of the cylinders, ready for the firing, thus completing the cycle of operations.

Anothcr feature of our invention consists in an oil guard 36, which is attached to the piston an serves as a means for preventing the oil in the crank casing from being thrown or drawn through the valve in the piston into the-cylinder and thus wasted. The piston 8 is cut away on its outer surface as at 35, and the oil guard 36, which is preferably made of spun brass is threaded on to the cut away end portion of the pisearly shown in the drawings, is conical in shape, and the end thereof is closed, except for a slot 37, which allows the operation of the pitman, and also allows the gas for operating the engine to pass through into the hollow piston, and A be thrown against the oil guard, which will not only prevent the greater portion of the oil from passing through the piston into the cylinder, but will cause the oil to flow in between the piston and cylinder, and properly lubricate the same.

Having thus described our inventioh, what we claim as new and desire to secure by Letters Patent, is

1. A two cycle gas engine including 'in combination, a cylinder, :1 piston, a piston rod pivoted thereto, a reciprocating intake valve located centrally of said piston, a yielding cam finger carried by said piston rod for engaging and opening said intake valve as the piston moves relative to the cylinder, said cam finger being cut away in rear of the cam face thereof whereby when said cam finger slips by the stem of the intake valve the same is allowed to quickly close.

2. A as engine including in combination,

a cylinder carried thereby, a stationary crank shaft, :1 piston, a piston rod connecting said piston to said crank shaft, a reciprocating. intake valve-located in said piston,

including in combination, a rotating casing,

and yielding means carried by said piston rod for opening said intake valve as said cylinder rotates, said yielding means being so constructed and positioned as to pass by the stem of the intake valve and release the same.

4. A two-cycle rotary cylinder gas engine including in combination, a rotating casing, a cylinder carried thereby, a stationary crank shaft, a piston, a piston rod connecting said piston to said crank shaft, a reciprocating intake valve located in said piston, and a yielding cam finger carried by said piston rod and engaging said intake valve as the cylinder rotates, for opening the in take valve, said yielding cam finger being cut away in rear of the cam face thereof whereby When said finger slips by the stem of the intake valve the same is allowed to quickly close.

net

finger in one direction, and a spring for i holding said finger yieldingly in contact With said stop. 1

In testimony whereof We affix our signatures, in presence of two witnesses.

ROBERT S. MOORE. JAMES LEE SEMMONS.

Witnesses:

E. PARKINS, C. L. STURTEVANT. 

